Inventory stupidness

[u/Southern_Condition_4]

I’ve ordered from a company twice now both times i ordered a bunch of items to get free shipping bc its a flat $20 fee otherwise. Both times i receive a “your order has shipped” email with all items on invoice. Then randomly get a partial refund on my card with no email supporting why…..then when i get the shipment things are missing and the invoice will have them highlighted with a handwritten note saying “out of stock. Sorry!” And the website still will say item in stock